Passive cooling enclosure system and method for electronics devices

ABSTRACT

An apparatus for passively cooling electronics. The apparatus for passively cooling electronics includes at least one heat sink configured to be thermally coupled to at least one cabinet. When the at least one cabinet is thermally coupled to the at least one heat sink, the at least one heat sink draws heat from the at least one cabinet.

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS

This application is a Continuation-In-Part of U.S. application Ser. No.12/488,818, titled “Passive Cooling System And Method For ElectronicsDevices,” filed Jun. 22, 2009, incorporated herein by reference in itsentirety.

BACKGROUND

The present disclosure relates generally to the field of passive coolingand more particularly to passive cooling of electronics devices.

Legacy electronics device cooling technologies typically use a forcedair cooling method to remove heat from the electronics device. Morerecently, advanced cooling methods, such as water cooling and phasecooling systems, have been explored. However, there are many issues, forexample with installation and maintenance that arise from the use ofthese systems in electronics devices.

The majority of existing systems depend on a forced air cooling method,i.e. fans. In existing systems, fans are used to cool processors andother internal components. Fans suffer from multiple deficiencies. Forexample, fans require significant physical space, are noisy because ofhigh RPMs, require a significant ventilation space, produce heat as theyare working to reduce heat, and consume vast amounts of power tooperate. Additionally, the manufacturing process by which the majorityof fans are made in some instances may use harmful industrial chemicalsthat could be reactivated as the temperature of a fan's blades increasesthereby releasing these chemicals into exposed environments. Thus, thereare high costs as well as potential health and environmental issuesassociated with operating fan-based systems. Often, data centers aredesigned for more wattage then necessary in order to account fornecessary, but inefficient cooling systems. In addition, fan-basedsystems are prone to failure due to accumulation of dust, motormalfunction or burn-out thereby increasing operational and maintenancecosts. When over-heating occurs components suffer irreversible damage,increasing cost, power consumption, and environmental impact.

Liquid cooling systems are two systems in one. Liquid cooling systemsare greatly limited in their cooling capacity, depending on theconfiguration of the electronics device. Liquid cooling systems requireheat exchangers such as a radiator. As a result, liquid cooling systemsstill require fans to cool the radiator and other components notattached to a heat exchanger thereby supplanting the inefficiency of aforced air cooling system with a potentially dangerous and costly liquidcooling system still reliant on fans. Liquid cooling systems requiresignificant physical space, are complicated, are noisy because ofradiator fans, require a significant ventilation space, produce heat asthey are working to reduce heat, and consume vast amounts of power tooperate and maintain. The end user must devote significant time andeffort to set-up and maintain a liquid cooling system.

Moreover, the proximity of cooling liquid with electronics is apotential safety risk. Because components produce a lot of heat, thetubing typically used is constantly expanding and contracting causingthe tubes to fail and leak cooling solution, which can result inelectrical shorts and irreparable internal damage.

Phase cooling involves using a compressor system to cool electronics.Phase cooling typically only cools the CPU so fans are still needed tocool other components. The fans and compressor make a significant amountof noise, require extensive maintenance, and consume a significantamount of power. Operating a phase cooling system requires a high degreeof technical proficiency.

Thus, improved cooling systems and techniques are needed.

SUMMARY

A representative embodiment relates to an apparatus for passivelycooling electronics. The apparatus for passively cooling electronicsincludes at least one heat sink configured to be thermally coupled to atleast one cabinet. When the at least one cabinet is thermally coupled tothe at least one heat sink, the at least one heat sink draws heat fromthe at least one cabinet.

Another representative embodiment relates to an apparatus for passivelycooling electronics. The apparatus for passively cooling electronicsincludes a cabinet configured to be thermally coupled to at least oneheat sink. When the cabinet is thermally coupled to the at least oneheat sink, the at least one heat sink draws heat from the cabinet.

Another representative embodiment relates to a method for passivelycooling electronics. The method includes drawing heat from a cabinetthrough a thermal joint to at least one heat sink. The heat isdissipated in a channel. The at least one heat sink forms at least partof the channel.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a passive cooling system in accordancewith a representative embodiment.

FIG. 2 is an exploded view of the passive cooling system of FIG. 1 inaccordance with a representative embodiment.

FIG. 3 is a top view of the passive cooling system of FIG. 2 inaccordance with a representative embodiment.

FIG. 4 is a perspective view of the device module of FIG. 2 inaccordance with a representative embodiment.

FIG. 5A-5F are diagrams of representative heat pipe topologies inaccordance with a representative embodiment.

FIG. 6 is an exploded view of the heat pipe assembly of FIG. 2 inaccordance with a representative embodiment.

FIG. 7 is a diagram of the bridge plate of FIG. 6 in accordance with arepresentative embodiment.

FIG. 8 is a perspective view of the processor heat pipe assembly of FIG.2 in accordance with a representative embodiment.

FIG. 9 is a perspective view of a passive cooling enclosure system inaccordance with a representative embodiment.

FIG. 10 is a front view of the passive cooling enclosure system of FIG.9 in accordance with a representative embodiment.

FIG. 11 is a top view of the passive cooling enclosure system of FIG. 9in accordance with a representative embodiment.

FIG. 12 is a side view of the passive cooling enclosure system of FIG. 9in accordance with a representative embodiment.

FIG. 13 is a top view of the inside of a cabinet of FIG. 9 in accordancewith a representative embodiment.

FIG. 14 is a top view of a passive cooling enclosure system with a rearheat sink in accordance with a representative embodiment.

FIG. 15 is a top view of a passive cooling enclosure systemconfiguration in accordance with a representative embodiment.

FIG. 16 is a front view of a passive cooling enclosure systemconfiguration of FIG. 15 in accordance with a representative embodiment.

FIG. 17 is a top view of a server room in accordance with arepresentative embodiment.

FIG. 18 is a side view of the server room of FIG. 17 in accordance witha representative embodiment.

FIG. 19 is a top view of a server room with various alternateconfigurations in accordance with a representative embodiment.

FIG. 20 is a perspective view of a passive cooling enclosure system inaccordance with a representative embodiment.

FIG. 21 is a front perspective view of a passive cooling enclosuresystem of FIG. 20 in accordance with a representative embodiment.

FIG. 22 is a top view of a thermal joint in accordance with arepresentative embodiment.

FIG. 23 is a side view of a thermal joint of FIG. 22 in accordance witha representative embodiment.

FIG. 24 is a top view of a protected heat pipe in accordance with arepresentative embodiment.

FIG. 25 is a top view of a portion of a passive cooling system inaccordance with a representative embodiment.

FIG. 26 is a top view of power supply unit in accordance with arepresentative embodiment.

DETAILED DESCRIPTION

A passive cooling enclosure system and method for electronics devicesare described. In the following description, for purposes ofexplanation, numerous specific details are set forth to provide athorough understanding of representative embodiments of the invention.It will be evident, however, to one skilled in the art that therepresentative embodiments may be practiced without these specificdetails. The drawings are not to scale. In other instances, well-knownstructures and devices are shown in simplified form to facilitatedescription of the representative embodiments.

Referring to FIG. 1, a perspective view of a passive cooling system 100in accordance with a representative embodiment is shown. In anembodiment, the passive cooling system 100 is configured as a rack-mountchassis. The passive cooling system 100 includes a front panel 110, adrive bay 120, a cover 130, heat sinks 140, filler strip 150, and amedia drive 160. The front panel 110 includes holes 113 for mounting thepassive cooling system 100 to a rack (not shown). The rack can be a 19inch rack, a 23 inch rack, a half rack, or any other size or depth rack.Likewise, non-rack configurations are possible. Additionally, the holes113 can include quick connects, rails, or other fasteners. The frontpanel 110 also includes handles 115 for moving the passive coolingsystem 100 and a latch 111 for securing bay doors 125 that cover thedrive bay 120. The media drive 160 can be, for example, a compact disc(CD) burner or a tape drive.

The passive cooling system 100 can be any height or depth. Inparticular, the drive bay 120 can be a 1 unit, 2 unit, 4 unit, 8 unit,or 16 unit bay. The bays can be configured in various configurationssuch as horizontal or vertical. Additionally, the passive cooling system100 can include other input devices such as removable media drives,keyboards, displays, mice, or joysticks. Alternatively, the passivecooling system 100 can be a programmable logic controller chassis, ablade chassis, a VMEbus-type enclosure, a PCI-type enclosure, aCompactPCI-type enclosure, a server, or any other electronic device withmodular bays and/or sub-bays. The passive cooling system 100 can also bea desktop computer, a tower computer, an all-in-one system where thedisplay is integrated, an appliance, or a mobile platform such as alaptop.

Referring to FIG. 2, an exploded view of the passive cooling system 100of FIG. 1 in accordance with a representative embodiment is shown. Thepassive cooling system 100 includes a front panel 110, a cover 130, heatsinks 140, filler strip 150, and a media drive 160. The front panel 110includes handles 115 and a latch 111 for securing bay doors 125 thatcover the drive bay. The passive cooling system 100 also includes a heatpipe assembly 210, a device module 220, a processor heat pipe assembly230, a motherboard 260, a daughterboard 250, a bottom 270, and a backpanel 280. The front panel 110, the cover 130, heat sinks 140, fillerstrip 150, the bottom 270, and the back panel 280 constitute theenclosure of the passive cooling system 100.

The device module 220 includes a cradle assembly and an electroniccomponent. Preferably, the electronic component is a hot-swappablenon-volatile storage device such as a hard drive. Alternatively, theelectronic component can be any electronic device; for example, a 3.5″hard drive, a 2.5″ hard drive, a 5.25″ drive, an optical drive, a tapedrive, solid state drive, a card reader, a memory bank, a magneticmemory bank, a communications module, a daughterboard, a sensor module,or an input/output module. The electronic component is thermally coupledto the cradle assembly. The cradle assembly draws heat away from theelectronic component. The passive cooling system 100 can include aplurality of device modules. The cradle assembly can also include aclamping or securing mechanism as described in more detail below.

The device module 220 is removably mounted on the heat pipe assembly 210via the cradle assembly. The device module 220 is thermally coupled tothe heat pipe assembly 210. The heat pipe assembly 210 is thermallycoupled to the heat sinks 140 and filler strip 150. The heat pipeassembly 210 draws heat from the device module 220. The heat sinks 140draw heat from the heat pipe assembly 210. Each of the thermal couplingswhere two separate pieces meet can include a thermal compound to enhancethe thermal characteristics of the junction. Alternatively, the heatpipe assembly 210, heat sinks 140 and filler strip 150 can be one piecethat is thermally continuous. The heat pipe assembly 210 can alsoinclude electrical connections for the electronic component. The heatpipe assembly 210 is described in more detail below.

The electronic component of device module 220 is electrically connectedto the motherboard 260. The motherboard 260 can also includedaughterboard 250 which can be, for example, a video card, an Ethernetcard, a processor card, or any other computer card. The motherboard 260controls the device module 220 and daughterboard 250. The motherboard260 can be powered through the rack to which the passive cooling system100 is mounted. The motherboard 260 includes one or more processorswhich are thermally coupled to the heat sinks 140 by processor heat pipeassembly 230. Alternatively, other devices of the motherboard 260 anddaughterboard 250, for example, a power supply, can also be thermallycoupled to the heat sinks 140. Advantageously, the passive coolingsystem 100 provides effective cooling to the device module 220 andprocessors of the motherboard 260 without the use of a fan or liquidcooling system, and without the need for additional power or costlymaintenance.

Referring to FIG. 3, a top view of the passive cooling system 100 ofFIG. 2 in accordance with a representative embodiment is shown. Theblock arrows depict the main thermal paths through which heat cantravel. The passive cooling system 100 includes a front panel 110, heatsinks 140, filler strips 150, a heat pipe assembly 210, device modules220, a processor heat pipe assembly 230, a motherboard 260, a memorymodule 310, and a power supply heat pipe assembly 320.

As device modules 220 generate heat, heat pipe assembly 210 draws heataway from the drive modules 220. The filler strips 150 draw heat awayfrom the heat pipe assembly 210. Finally, the heat sinks 140 draw heataway from the filler strips 150 and dissipate the heat into the ambientatmosphere. Thus, the heat sinks 140, filler strips 150, heat pipeassembly 210, and device modules 220 form an open-loop cooling system.

As a processor (not shown) of the motherboard 260 generates heat,processor heat pipe assembly 230 draws heat away from the processor. Theheat sinks 140 draw heat away from the processor heat pipe assembly 230.Likewise, as a power supply (not shown) of the motherboard 260 generatesheat, power supply heat pipe assembly 320 draws heat away from theprocessor. The heat sinks 140 draw heat away from the power supply heatpipe assembly 320. In some cases, components do not need additionalcooling. For example, memory module 310 can be cooled by the ambientatmosphere. Advantageously, the passive cooling system 100 provideseffective cooling to the device module 220, processor and power supplywithout the use of a fan or liquid cooling system.

Referring to FIG. 4, a perspective view of the device module 220 of FIG.2 in accordance with a representative embodiment is shown. The devicemodule 220 includes a cradle assembly 410 and an electronic component420. The electronic component 420 is fastened to the cradle assembly410. The electronic component 420 can be a non-volatile storage device,such as a hard disc drive, as described above. The cradle assembly 410can be both a thermal sink and a docking mechanism for the electroniccomponent 420. The cradle assembly 410 can be made of metal, or anythermally conductive material. Preferably, the cradle assembly 410 ismade of aluminum or copper alloy. The cradle assembly 410 can bemachined, cast, or extruded. Heat spreaders can be embedded in thecradle assembly 410. A thermal compound can be applied to the spacebetween the electronic component 420 and the cradle assembly 410.

The cradle assembly 410 includes heat pipe conduits 430. The cradleassembly 410 is docked on heat pipes that match heat pipe conduits 430.The cradle assembly 410 can have one or a plurality of heat pipeconduits 430. The heat pipe conduits 430 are disposed on either side ofthe electronic component 420. Alternatively, the heat pipe conduits 430can be located near a primary heat source of the electronic component420. The heat pipe conduits 430 can be 1.5 inches or smaller in diameterdepending on the application; however, larger conduits are alsopossible. For example, the heat pipe conduits 430 can range from 1.5inches to 0.25 inches in diameter. Additionally, the heat pipe conduits430 can each be a different size. For example, a heat conduit/heat pipelocated towards the center of an enclosure can be larger than a heatconduit/heat pipe located towards the outside of the enclosure. The heatpipe conduits 430 include clamping slots 440 which can be used to changethe size of the heat pipe conduits 430.

The clamping slots 440 are associated with a clamping mechanism 450.When a clamping lever 460 is pressed in, the clamping mechanism 450closes the clamping slots 440 thereby tightening the heat pipe conduits430. The clamping action creates a better thermal coupling between thecradle assembly 410 and its associated heat pipes. Additionally, theclamping action fastens the cradle assembly 410 to the heat pipes sothat the cradle assembly 410 cannot move and maintain thermalcontinuity. Thus, the cradle assembly 410 can be quickly removed andreplaced. Alternatively, many other clamping and/or attachmentmechanisms are possible.

Referring to FIG. 5A-5F, diagrams of representative heat pipe topologiesin accordance with a representative embodiment are shown. As shown inFIG. 5A, a heat pipe 510 can be circular. As shown in FIG. 5B, a heatpipe 520 can have fingers that press into the side of cradle assembly525. As shown in FIG. 5C, a heat pipe 530 can have fins to increasesurface area. As shown in FIG. 5D, a heat pipe 540 can be square and bepressed between cradle assembly 547 and a separate batten 545. As shownin FIG. 5E, a heat pipe 550 can be triangular. As shown in FIG. 5F, aheat pipe 560 can be circular and be pressed between cradle assembly 567and a separate batten 565.

Referring to FIG. 6, an exploded view of the heat pipe assembly 210 ofFIG. 2 in accordance with a representative embodiment is shown. The heatpipe assembly 210 includes a bridge plate 610, a back plane printedcircuit board (PCB) 620, and heat pipes 630. The heat pipes 630 arecoupled to the bridge plate 610 through the back plane PCB 620. Thebridge plate 610 is coupled to filler strips 150 by screws 655. Athermal compound can be applied to the space between the bridge plate610 and the filler strips 150.

The bridge plate 610 can be both a thermal sink and a dock for devicemodule 220. The bridge plate 610 can be made of metal or any thermallyconductive material. In some implementations, the bridge plate 610 ismade of an aluminum or copper alloy. The bridge plate 610 can bemachined, cast, stamped or extruded. Heat spreaders can be embedded inthe bridge plate 610. The bridge plate 610 includes a series of tapholes for heat pipes 630. Alternatively, the heat pipes 630 can befastened to the bridge plate 610 by pressing or other fastening meansthat provide a good thermal connection. A thermal compound can beapplied to the space between the bridge plate 610 and the heat pipes630.

The device module 220 slides over a pair of heat pipes 630. The heatpipes 630 are tapered at one end to make sliding the device module 220onto the heat pipes 630 easy. The heat pipes 630 can range from 1.5inches or less in diameter depending on the application. The heat pipes630 are arranged so that when a device module is mounted, the heat pipes630 are disposed on either side of the device module. Alternatively, theheat pipes 630 can be arranged in various configurations around a devicemodule such as on the top and bottom. The heat pipes 630 can be made ofmetal or any thermally conductive material. Preferably, the heat pipes630 are made of thermally conductive material, such as copper alloy oraluminum. The heat pipes 630 can also be plated to prevent oxidation.The heat pipes 630 can be machined, cast, stamped or extruded. In use, athermal compound can be applied to the surface of the heat pipes 630 topromote thermal conductivity to an associated device module 220 and toreduce oxidation. When the clamping mechanism of the device module 220is set, the cradle assembly of the device module 220 presses against theassociated heat pipes 630 creating a thermal and physical connection.

The back plane PCB 620 includes the power and data connections for thedevice module 220. The back plane PCB 620 is connected to themotherboard of the electronics device. Thus, the device module 220 canbe easily electrically connected to the motherboard. The back plane PCB620 is a custom PCB designed to fit around the heat pipes 630. The backplane PCB 620 includes connections appropriate for the particular kindof electronic component associated with the device module 220. Forexample, where the device module 220 is mounted with a hard disk, theback plane PCB 620 includes power and serial ATA, EIDE, IDE, or SCSIconnectors. Thus, when a user inserts device module into a bay, thedevice module engages a power connector and a data connector. When theuser engages the clamping mechanism, the device module becomes locked inplace. The clamping mechanism can be designed to actively engage theconnectors on the back plane PCB 620.

Referring to FIG. 7, a diagram of the bridge plate 610 of FIG. 6 inaccordance with a representative embodiment is shown. The bridge plate610 includes heat spreaders 710 for each set of heat pipes. In oneimplementation, the bridge plate 610 is aluminum and the heat spreader710 is made of copper alloy. The heat spreader 710 is located inside ofthe bridge plate 610. The bridge plate 610 also includes holes 720 whichare used to attach the heat pipes. The holes 720 go through the heatspreader 710 so that when the heat pipes are attached, there is a directthermal connection between the heat pipes and the heat spreader 710. Theheat spreader 710 increases the thermal transfer efficiency of thebridge plate 610 by directing the thermal flow. In this example, theheat spreaders 710 are doughnut shaped. Alternatively, the heat spreadercould run horizontally as well as other configurations.

Referring to FIG. 8, a perspective view of the processor heat pipeassembly 230 of FIG. 2 in accordance with a representative embodiment isshown. Motherboard 260 includes processors 810. A first thermal mass 820is attached to each of the processors 810. The first thermal masses 820are thermally coupled to second thermal masses 840 by heat pipes 830.The second thermal masses 840 are each thermally coupled to a heat sink140. A thermal compound can be applied between the first thermal masses820 and the processors; and the second thermal masses 840 and the heatsinks 140.

As the processors produce heat, the first thermal masses 820 draw heatfrom the processors. The second thermal masses 840 draw heat from thefirst thermal masses 820 through heat pipes 830. The heat sinks 140 drawheat from the second thermal masses 840. Finally, the heat sinks 140dissipate the heat into the ambient air. Advantageously, the passivecooling system provides effective cooling to processors without the useof fans or a liquid cooling system.

As noted above, a power supply can also be thermally coupled to a heatsink. Referring to FIG. 25, a top view of a portion of a passive coolingsystem 2500 in accordance with a representative embodiment is shown. Theportion of a passive cooling system 2500 is an illustrative power supplyarea of a passive cooling system including a heat sink 140, a fillerstrip 150, and a motherboard 260, as described above.

A power supply 2510 can be thermally coupled to the heat sink 140. Thepower supply 2510 provides power for the passive cooling system. Thepower supply 2510 can include a printed circuit board 2520, a firstpower supply integrated circuit 2530, a second power supply integratedcircuit 2540, components 2550, and capacitor 2560. The power supply 2510can be attached to the heat sink 140 by standoffs 2570. The first powersupply integrated circuit 2530 and the second power supply integratedcircuit 2540 can be, for example, a power transistor or a power supplymodule. The first power supply integrated circuit 2530 and the secondpower supply integrated circuit 2540 can, for example, switch at a highrate in order to convert 120 VAC to one of at least 12 VDC, 5 VDC, 3.3VDC or any other voltage, thereby generating heat.

In one illustrative embodiment, the first power supply integratedcircuit 2530 and the second power supply integrated circuit 2540 aresoldered to a first side of the printed circuit board 2520 such that thefirst power supply integrated circuit 2530 and the second power supplyintegrated circuit 2540 can be positioned directly against the heat sink140 thereby thermally coupling the first power supply integrated circuit2530 and the second power supply integrated circuit 2540 to the heatsink 140. The junction between the power supply integrated circuits(2530, 2540) and the heat sink 140 can include a thermal compound toenhance the thermal characteristics of the thermal coupling. Heatgenerated by the power supply 2510, in particular, the first powersupply integrated circuit 2530 and the second power supply integratedcircuit 2540, is drawn to the heat sink 140 and dissipated into theambient air.

Other parts of the power supply 2510, such as components 2550, andcapacitor 2560, can be located on a second side of the printed circuitboard 2520. The components 2550 and capacitor 2560 are arranged so thatthe area of the printed circuit board 2520 can be minimized whileproviding clearance for the power supply integrated circuits (2530,2540) on the first side of the printed circuit board 2520.Alternatively, the first power supply integrated circuit 2530, thesecond power supply integrated circuit 2540, the components 2550, andthe capacitor 2560 can be located on one side of the printed circuitboard 2520 and arranged so that the power supply integrated circuits(2530, 2540) can contact the heat sink 140. The heat sink 140 caninclude a raised area to enable contact with the power supply integratedcircuits (2530, 2540). Alternatively, any number of power supplyintegrated circuits or components can be thermally coupled to the heatsink. Advantageously, the power supply can be cooled directly by a heatsink of the passive cooling system.

Referring to FIG. 26, a top view of power supply unit 2600 in accordancewith a representative embodiment is shown. The power supply unit 2600can be integrated into a passive cooling system. The power supply unit2600 provides power to the passive cooling system.

The power supply unit 2600 includes a power supply 2610 and a heat sink140. The power supply 2610 can be thermally coupled to the heat sink140. The power supply 2610 can include a printed circuit board 2520, afirst power supply integrated circuit 2530, a second power supplyintegrated circuit 2540, components 2550, and capacitor 2560. The powersupply 2610 can be attached to the heat sink 140 by standoffs 2570. Thefirst power supply integrated circuit 2530 and the second power supplyintegrated circuit 2540 can be, for example, a power transistor or apower supply module.

In one illustrative embodiment, the first power supply integratedcircuit 2530 and the second power supply integrated circuit 2540 aresoldered to a first side of the printed circuit board 2520. The firstpower supply integrated circuit 2530 is coupled to a first heat pipe2630. The first heat pipe 2630 is coupled to the heat sink 140. Thus,the first power supply integrated circuit 2530 is thermally coupled tothe heat sink 140 via the first heat pipe 2630. Heat generated by thefirst power supply integrated circuit 2530 is drawn to the heat sink 140through the first heat pipe 2630 and dissipated into the ambient air.The first heat pipe 2630 can be an “I-beam” shape; however, any othershape can be used. The joints between the first power supply integratedcircuit 2530, the first heat pipe 2630, and the heat sink 140 caninclude thermal compound to enhance thermal coupling.

The second power supply integrated circuit 2540 is coupled to a secondheat pipe 2640. The second heat pipe 2640 is coupled to the heat sink140. Thus, the second power supply integrated circuit 2540 is thermallycoupled to the heat sink 140 via the second heat pipe 2640. Heatgenerated by the second power supply integrated circuit 2540 is drawn tothe heat sink 140 through the second heat pipe 2640 and dissipated intothe ambient air. The second heat pipe 2640 can be an “I-beam” shape;however, any other shape can be used. The joints between the secondpower supply integrated circuit 2540, the second heat pipe 2640, and theheat sink 140 can include thermal compound to enhance thermal coupling.

The first heat pipe 2630 and the second heat pipe 2640 can be made ofcopper alloy, aluminum, metal, or any other thermally conductivematerial. As shown, the first heat pipe 2630 and the second heat pipe2640 can be different heights in order to accommodate the differentheights of the first power supply integrated circuit 2530 and the secondpower supply integrated circuit 2540. Alternatively, one or more heatpipes can be used to connect the power supply to the heat sink. Thepower supply can include any number of power supply integrated circuitsand other components. Additionally, the heat pipes can have variousconfigurations depending on the particular implementation of the powersupply. For example, a heat pipe could span across many components orpierce the printed circuit board to contact the bottom of a component.Advantageously, the heat pipes cool the power supply by drawing heatfrom the power supply to the heat sink.

Passive Cooling Enclosure System

Referring to FIG. 9, a perspective view of a passive cooling enclosuresystem 900 in accordance with a representative embodiment is shown. Inone embodiment, the passive cooling enclosure system 900 is configuredas a rack. The passive cooling enclosure system 900 can include asupport structure 905, heat sinks 910, cabinets 920, heat pipes 930, andpipe connectors 940. Unlike the passive cooling system 100, the heatsinks of passive cooling enclosure system 900 can be located on the rackenclosure instead of (or in addition to) the individual rack-mountchassis. The passive cooling enclosure system 900 can be a rack formounting rack-mount chassis. The passive cooling enclosure system 900can be integrated into, or be part of, a structure such as a standardshipping container, a containerized data center, or a building. Forexample, the heat sinks 910 can be integrated into the sides of ashipping container.

The support structure 905 can support heat sinks 910 and cabinets 920.The support structure 905 can be the size of a standard rack, forexample, for mounting servers. The support structure 905 can be anyheight, depth, and width. The support structure 905 can include a powersupply and a back plane for powering and communicatively coupling thecabinets 920.

The heat sinks 910 can include fins, coolant channels, or any other heatdissipation means. Fins are preferably integrated vertically into theoutside of the heat sinks 910. The heat sinks 910 can be made ofaluminum, aluminum alloy, or any other thermal conductor. The heat sinks910 can include heat spreaders as described above (not shown). The heatspreaders can be made of copper alloy, or any other thermal conductor.

The heat sinks 910 can include pipe connectors 940. The pipe connectors940 thermally couple the heat sinks 910 to heat pipes 930. The pipeconnectors 940 can include a clamping mechanism or clamping means tomechanically secure the pipe connectors 940 to the heat pipes 930thereby promoting a thermal bond between the pipe connectors 940 and theheat pipes 930. In addition, the pipe connectors 940 can mechanicallysecure the cabinets 920 to the support structure 905. The pipeconnectors 940 can be separate from the heat sinks 910 or integratedinto the heat sinks 910. Various clamping mechanisms can be employed asdescribed further below. The pipe connectors 940 can be made ofaluminum, aluminum alloy, or any other thermal conductor.

The cabinets 920 can be inserted into the support structure 905. Thecabinets 920 can be a server, a switch, a router, a storage device, abattery backup, electrical equipment, or any other electronics device.The cabinets 920 can be any height or depth. In particular, the cabinets920 can include bays, as described above. The bays can be configured invarious configurations such as horizontal or vertical. Additionally, thecabinets 920 can include other input devices such as removable mediadrives, keyboards, displays, mice, or joysticks. Alternatively, thecabinets 920 can be a programmable logic controller chassis, a bladechassis, a VMEbus-type enclosure, a PCI-type enclosure, aCompactPCI-type enclosure, a server, or any other electronic device withmodular bays and/or sub-bays. Alternatively, the heat sinks 910 cansupport cabinets 920.

The cabinets 920 can include heat pipes 930. The heat pipes 930 can bethermally coupled to the internal components of the cabinets 920. Forexample, the heat pipes 930 can be thermally coupled to processors, diskdrives, or other heat generating components of the cabinets 920. On eachside associated with a heat sink 910, the heat pipe 930 can be a singleheat pipe or multiple, individual heat pipes. Alternatively, the heatpipes 930 can be part of the heat sinks 910 and the pipe connectors 940can be part of the cabinets 920. Advantageously, heat from each of thecabinets 920 can be drawn out to the heat sinks 910 through heat pipes930 and pipe connectors 940. Advantageously, each of the cabinets 920 iscooled by thermal conduction thereby eliminating dust build-up oninternal components of the cabinets 920.

In one illustrative embodiment, each of the cabinets 920 can be a serverwith modular bays as described above. In another illustrativeembodiment, each of the cabinets 920 can be a sealed rack chassis unitsuch as a hermetically sealed unit. Advantageously, a sealed rackchassis unit can be easily removed and cleaned. For example, suppose aserver farm consisting of passive cooling enclosure systems was locatedin an area that was exposed to a biohazard such as anthrax or toparticulate contamination, floods, or a hurricane. Personnel couldeasily remove and decontaminate or salvage the sealed rack chassisunits. The decontaminated or salvaged sealed rack chassis units couldthen be safely moved to a different facility thereby preserving theequipment and the data stored on the sealed rack chassis units. Inaddition, the support structure 905 and heat sinks 910 can be easilydecontaminated. In addition, any power modules or other electronicsassociated with the passive cooling enclosure system 900 can be sealedin a removable cabinet.

In another illustrative embodiment, the passive cooling enclosure system900 can be integrated into, or be part of, a structure such as astandard shipping container, a containerized data center, or a building.For example, the heat sinks 910 can be integrated into the outside of ashipping container. The fins of heat sinks 910 can be located along thesides (and top and bottom) of the shipping container. Advantageously,heat generated by cabinets 920 can be drawn to heat sinks 910.Advantageously, the heat sinks 910, which are part of the shippingcontainer, can be cooled with ambient air. Advantageously, a portabledata center including the passive cooling enclosure system 900 requiresminimal maintenance and requires less power to operate than aconventional server farm.

In particular, sealed rack chassis units can be advantageous in manymilitary applications. For example, the sealed design of the cabinets920 allows the cabinets 920 to be operated in extreme environments suchas the desert, sea-side, or the arctic. For example, moisture entering acabinet in an arctic environment could easily cause condensation tobuild on electronic components causing a failure. Because the cabinets920 are sealed, dust, dirt, sand, moisture, and other contaminatescannot get into the cabinets 920. Additionally, the passive coolingenclosure system 900 consumes significantly less power than a typicalserver rack. Therefore, the passive cooling enclosure system 900 iseasily adaptable to many environments where acquiring power is achallenge. Consequently, the cabinets 920 require minimal maintenance,use less power than a typical rack, and are less prone to failure.

Referring to FIG. 10, a front view of the passive cooling enclosuresystem 900 of FIG. 9 in accordance with a representative embodiment isshown. The passive cooling enclosure system 900 includes heat sinks 910,cabinets 920, heat pipes 930, and pipe connectors 940 as discussedabove.

Referring to FIG. 11, a top view of the passive cooling enclosure system900 of FIG. 9 in accordance with a representative embodiment is shown.The passive cooling enclosure system 900 includes heat sinks 910,cabinets 920, heat pipes 930, and pipe connectors 940 as discussedabove.

Referring to FIG. 12, a side view of the passive cooling enclosuresystem 900 of FIG. 9 in accordance with a representative embodiment isshown. The passive cooling enclosure system 900 includes cabinets 920,heat pipes 930, and pipe connectors 940 as discussed above.

Referring to FIG. 13, a top view of the inside of a cabinet 920 of FIG.9 in accordance with a representative embodiment is shown. The cabinet920 includes heat pipes 930 as described above. The right side ofcabinet 920 shows many individual heat pipes and the left side ofcabinet 920 shows a single heat pipe.

The heat pipes 930 can be thermally connected to internal heat pipes1360. The internal heat pipes 1360 are thermally coupled to bridge plate1350. The bridge plate 1350 can be thermally coupled to device heatpipes 1370. The device heat pipes 1370 can be thermally coupled todevices 1310. Devices 1310 can be, for example, hard drives as discussedabove. Processors 1320 can also be thermally coupled to the internalheat pipes 1360 and/or to bridge plate 1350. Thus, heat generated bydevices 1310 and processors 1320 can be drawn from the devices 1310 andprocessors 1320 to the heat pipes 930. Alternatively, where a cabinetincludes pipe connectors, heat generated by devices 1310 and processors1320 can be drawn from the devices 1310 and processors 1320 to the pipeconnectors.

The devices 1310 and processors 1320 can be electrically connected bymotherboard 1340. Motherboard 1340 can be electrically connected toexternal devices through port 1380. Port 1380 can be hermetically sealedallowing electrical connections with cabinet 920 without exposing theinternal components of the cabinet 920 to contaminants.

Referring to FIG. 14, a top view of a passive cooling enclosure systemwith a rear heat sink 1400 in accordance with a representativeembodiment is shown. In one embodiment, the passive cooling enclosuresystem with a rear heat sink 1400 is configured as a rack. The passivecooling enclosure system with a rear heat sink 1400 includes a heat sink1410, a cabinet 1420, heat pipes 1430, and pipe connectors 1440.

The heat sink 1410 can include fins, coolant channels, or any other heatdissipation means as discussed above. The heat sink 1410 is locatedtoward the rear. In some embodiments, the heat sink 1410 also providesthe structure of the rack.

The heat sink 1410 can include heat pipes 1430. The heat pipes 1430 canbe thermally coupled to the heat sink 1410. The heat pipes 1430 protrudefrom the heat sink 1410. In some embodiments, the heat pipes 1430 can betapered.

The cabinet 1420 can include pipe connectors 1440. The pipe connectors1440 include recesses that match the heat pipes 1430. When the cabinet1420 is mounted to the passive cooling enclosure system with a rear heatsink 1400, pipe connectors 1440 slide over heat pipes 1430. The pipeconnectors 1440 can include a clamping mechanism or clamping means tomechanically secure the pipe connectors 1440 to the heat pipes 1430thereby promoting a thermal bond between the pipe connectors 1440 andthe heat pipes 1430. In addition, the pipe connectors 1440 canmechanically secure the cabinets 1420 to the heat pipes 1430.

Passive cooling enclosure systems can be arranged in variousconfigurations. Referring to FIG. 15, a top view of a passive coolingenclosure system configuration in accordance with a representativeembodiment is shown. In FIG. 15, two passive cooling enclosure systems900 are arranged side-by-side. Each passive cooling enclosure system 900includes a support structure 905 and heat sinks 910 as discussed above.

The two passive cooling enclosure systems 900 are separated by a channel1510. The channel 1510 is formed in part by two heat sinks 910 from eachof the two passive cooling enclosure systems 900. The channel 1510 canact like a duct to contain air. Additionally, the channel 1510 can beintegrated into other data center monitoring and/or coolingtechnologies. In one illustrative embodiment, the channel 1510 can beused to contain cool air. In another illustrative embodiment, thechannel 1510 can be used to contain a gas such as, but not limited to,air, humidified air, air conditioned air, nitrogen gas, or any othergas. In another illustrative embodiment, the channel 1510 can be used tocontain a liquid such as, but not limited to, glycol, ammonia, water, orany other liquid. The channel 1510 can be adapted to the particularcoolant mechanism employed.

Referring to FIG. 16, a front view of a passive cooling enclosure systemconfiguration of FIG. 15 in accordance with a representative embodimentis shown. The two passive cooling enclosure systems 900 are arrangedside-by-side. Each passive cooling enclosure system 900 includes asupport structure 905, heat sinks 910, and cabinets 920 as discussedabove.

The two passive cooling enclosure systems 900 are separated by a channel1510. The channel 1510 is formed in part by two heat sinks 910 from eachof the two passive cooling enclosure systems 900. The channel 1510 canact like a duct to contain air. In one illustrative embodiment, thechannel 1510 can be used to contain a gas. In another illustrativeembodiment, the channel 1510 can be used to contain a liquid.

Air can move through the channel 1510 as represented by arrow 1610. Theair flows over the two heat sinks 910 from each of the two passivecooling enclosure systems 900 that form the channel 1510 thereby drawingheat from the heat sinks 910.

The channel 1510 can be used to conduct air passively over the heatsinks 910, i.e. by convection. In addition, air can be forced throughchannel 1510, for instance, by using a fan. In one illustrativeembodiment, cool air from outside a facility is drawn into the channel1510. Advantageously, the cooling air in the channel 1510 cannot reachthe cabinets 920 thereby preventing contaminants from enteringelectronics.

Advantageously, raised floors, hot aisle/cold aisle configurations, andheating ventilation and air conditioning (HVAC) systems are not need tocool the cabinets 920. Advantageously, computing and electronicsfacilities can be arranged in a space-saving manner by reducing theamount of ductwork needed for cooling server racks.

Referring to FIG. 17, a top view of a server room 1710 in accordancewith a representative embodiment is shown. The server room 1710 can bearranged in various configurations. In one illustrative embodiment,passive cooling enclosure systems 900 are arranged in rows. Every twopassive cooling enclosure systems 900 are separated by a channel 1510.The server room 1710 can be a building, a modular freight container,part of a vehicle, or any other enclosure.

Air moving through the channels 1510 can draw heat from heat sinks ofthe passive cooling enclosure systems 900. The channels 1510 can beconnected to a duct system. Thus, the inside of server room 1710 iscompleted separated from the cooling means. Advantageously, contaminatescannot reach the inside of server room 1710. In other illustrativeembodiments, the channels 1510 can be configured to contain a gas orliquid, as described above.

Referring to FIG. 18, a side view of the server room 1710 of FIG. 17 inaccordance with a representative embodiment is shown. The server room1710 can be arranged in various configurations. In one embodiment,passive cooling enclosure systems 900 are arranged in rows. Every twopassive cooling enclosure systems 900 are separated by a channel 1510.

The server room 1710 includes walls 1870, ceiling 1860, and floor 1850.The channels 1510 can extend from the floor 1850 to the ceiling 1860.Cable chases 1840 can run underneath floor 1850. Alternatively, cablingcan be run within the server room 1710.

The channels 1510 are connected to an intake duct 1890 below floor 1850and an exhaust duct 1880 above ceiling 1860. In one illustrativeembodiment, cool air from outside a facility is drawn into the intakeduct 1890 by convection. The cool air is drawn through channels 1510 andover heat sinks of the passive cooling enclosure systems 900. Thus, theair from the intake duct 1890 is heated. The heated air rises up in thechannels 1510 thereby drawing more cool outside air into the intake duct1890.

The heated air continues into the exhaust duct 1880 by convection. Theheated air is expelled to the outside. The convection properties of thechannels 1510 and related ductwork can be designed to exhibit specificconvective properties. For example, chimneys can be added to the exhaustduct 1880 in order to enhance the convection. In addition, multiplefloors can include continuous channels to enhance convection. Variouspassive and active cooling designs can be implemented as known by thoseof skill in the art. Advantageously, heat from the cabinets of thepassive cooling enclosure systems 900 can be passively removed therebyreducing cooling costs, facilities costs, maintenance costs, anddevelopment costs.

Referring to FIG. 19, a top view of a server room 1910 with variousalternate configurations in accordance with a representative embodimentis shown. The server room 1910 can be arranged in variousconfigurations. In one illustrative embodiment, passive coolingenclosure systems 900 are arranged in pods. Alternatively, more or fewerpassive cooling enclosure systems can be arranged in a pod. In addition,the pods can be rotated relative to one another in order to enhance thepacking of the pods in a particular space.

Every four passive cooling enclosure systems 900 are separated by achannel 1930 and cabling channels 1920. The four passive coolingenclosure systems 900 and cabling channels 1920 are arrangedback-to-back to form channel 1930. In this configuration, the heat sinksof the four passive cooling enclosure systems 900 can be designed sothat the heat sinks are only in the channel 1930. The server room 1910can be a building, a modular freight container, part of a vehicle, orany other enclosure.

Air moving through the channel 1930 can draw heat from heat sinks of thepassive cooling enclosure systems 900. The channel 1930 can be connectedto a duct system. Thus, the inside of server room 1910 is completedseparated from the cooling means. Advantageously, contaminates cannotreach the inside of server room 1910.

In another illustrative embodiment, passive cooling enclosure systemswith a rear heat sink 1400 (of FIG. 14) are arranged in an alternativepod arrangement. As discussed above, passive cooling enclosure systemswith a rear heat sink 1400 have the heat sink located towards the rearof the rack. Every four cooling enclosure systems with a rear heat sink1400 are separated by a channel 1940. Alternatively, more or fewerpassive cooling enclosure systems can be arranged in a pod. In addition,the pods can be rotated relative to one another in order to enhance thepacking of the pods in a particular space.

The four passive cooling enclosure systems with a rear heat sink 1400are arranged back-to-back to form channel 1940. In this configuration,the heat sinks of the four passive cooling enclosure systems with a rearheat sink 1400 are arranged so that the heat sinks are only in thechannel 1940.

Air moving through the channel 1940 can draw heat from heat sinks of thepassive cooling enclosure systems with a rear heat sink 1400. Thechannel 1940 can be connected to a duct system. Thus, the inside ofserver room 1910 is completed separated from the cooling means.Advantageously, contaminates cannot reach the inside of server room1910.

The heat pipes and pipe connectors can be implemented using variousthermal connection designs. Referring to FIG. 20, a perspective view ofa passive cooling enclosure system 2000 in accordance with arepresentative embodiment is shown. In FIG. 20, the passive coolingenclosure system 2000 is configured as a standard rack. The passivecooling enclosure system 2000 includes an enclosure structure 2005, heatsinks 2010, a cabinet 2020, heat pipes 2030, and pipe connectors 2040.

The enclosure structure 2005 can support heat sinks 2010. The enclosurestructure 2005 can be the size of a standard rack, for example, formounting servers. The enclosure structure 2005 can include anyelectronics device. The enclosure structure 2005 can be any height,depth, and width. The enclosure structure 2005 can include a powersupply and a back plane for powering and communicatively coupling thecabinet 2020.

The heat sinks 2010 can include fins, coolant channels, or any otherheat dissipation means (not shown). The heat sinks 2010 can be made ofaluminum, aluminum alloy, or any other thermal conductor. The heat sinks2010 can include heat spreaders as described above (not shown). The heatspreaders can be made of copper alloy.

The heat sinks 2010 can include pipe connectors 2040. The pipeconnectors 2040 thermally couple the heat sinks 2010 to heat pipes 2030.The pipe connectors 2040 can mechanically secure the cabinet 2020 to thepassive cooling enclosure system 2000. The pipe connectors 2040 can beintegrated into the heat sinks 2010. The pipe connectors 2040 caninclude slots 2072. The slots 2072 can have a wide taper at the front toallow easy cabinet mounting. The slots 2072 can run along the depth ofthe heat sinks 2010. The slots 2072 can slightly taper from front toback.

The cabinet 2020 can be inserted into the enclosure structure 2005. Thecabinet 2020 can be a server, a switch, a router, a storage device, abattery backup, electrical equipment, or any other electronics device.The cabinet 2020 can be any height or depth. In particular, the cabinet2020 can include bays, as described above. The bays can be configured invarious configurations such as horizontal or vertical.

The cabinet 2020 can include heat pipes 2030. The heat pipes 2030 can bethermally coupled to the internal components of the cabinet 2020. Forexample, the heat pipes 2030 can be thermally coupled to processors,disk drives, or other heat generating components of the cabinet 2020. InFIG. 20, the heat pipes 2030 run along both sides of the cabinet 2020.

The heat pipes 2030 thermally engage the slots 2072 as the cabinet 2020is inserted into the passive cooling enclosure system 2000. Thermalcompound can be used to enhance the thermal coupling between the heatpipes 2030 and the pipe connectors 2040. The heat pipes 2030 can includea starting block 2062, a first compression rail 2066, and a secondcompression rail 2066. The starting block 2062 guides the heat pipes2030 as they are inserted into slots 2072. The starting block 2062protects the edges of the first compression rail 2066 and the secondcompression rail 2066. The starting block 2062 is made of a durablematerial such as aluminum, aluminum alloy, or any other metal. Together,the first compression rail 2066 and the second compression rail 2066taper to a slightly larger width than the slots 2072, i.e. at thestarting block 2062 the width of the first compression rail 2066 and thesecond compression rail 2066 is about that of the starting block 2062,but, at the opposite end, the first compression rail 2066 and the secondcompression rail 2066 are slightly wider than the front opening of slots2072.

The first compression rail 2066 and the second compression rail 2066 canflex to match the slots 2072 thereby engaging the slots 2072 bothmechanically and thermally. The first compression rail 2066 and thesecond compression rail 2066 can have filleting or other relieving thatenhances flexing. The first compression rail 2066 and the secondcompression rail 2066 can be made of any flexible, thermally conductivematerial such as aluminum, aluminum alloy, or any other metal.

Thus, when the cabinet 2020 is inserted into a set of slots 2072, thestarting block 2062 guides the first compression rail 2066 and thesecond compression rail 2066 into the slots 2072. As the cabinet 2020 ispushed further into the passive cooling enclosure system 2000, the firstcompression rail 2066 and the second compression rail 2066 press againstthe sides of the slots 2072 thereby creating a thermal coupling betweenthe heat pipes 2030 and the pipe connectors 2040.

Referring to FIG. 21, a front perspective view of a passive coolingenclosure system 2000 of FIG. 20 in accordance with a representativeembodiment is shown. The passive cooling enclosure system 2000 includesan enclosure structure 2005, heat sinks 2010, a cabinet 2020, heat pipes2030, and pipe connectors 2040. The pipe connectors 2040 can includeslots 2072. The heat pipes 2030 can include a first compression rail2066, and a second compression rail 2066. FIG. 21 shows both heat pipes2030 of cabinet 2020 engaging slots 2072 of pipe connectors 2040.

Referring to FIG. 22, a top view of a thermal joint 2200 in accordancewith a representative embodiment is shown. In one illustrativeembodiment, the thermal joint 2200 can be a thermal and mechanicalcoupling between a heat pipe 2230 and a pipe connector 2240. The heatpipe 2230 is associated with a cabinet 2220. The pipe connector 2240 isassociated with a heat sink 2210.

The pipe connector 2240 includes a heat pipe conduit 2245. The pipeconnector 2240 is docked on a heat pipe protrusion 2235 that matchesheat pipe conduit 2245. The pipe connector 2240 can have one or aplurality of heat pipe conduits 2245. A heat pipe protrusion can bedisposed on either side of the cabinet 2220. The heat pipe conduit 2245can be 1.5 inches or smaller in diameter depending on the application;however, larger conduits are also possible. For example, the heat pipeconduit 2245 can range from 1.5 inches to 0.25 inches in diameter.Additionally, the heat pipe conduits at various locations in a passivecooling enclosure system can each be a different size. For example, aheat conduit/heat pipe for a power supply cabinet can be larger than aheat conduit/heat pipe for a server cabinet. The heat pipe conduit 2245includes a clamping slot which can be used to change the size of theheat pipe conduit 2245. The heat pipe conduit 2245 can have variousprofiles such as those depicted in FIGS. 5A-5F. When the cabinet 2220 isinserted in the passive cooling enclosure system, the heat pipeprotrusion 2235 engages heat pipe conduit 2245. Alternatively, the heatpipe protrusion 2235 and the heat pipe conduit 2245 can be tapered fromback to front.

Referring to FIG. 23, a side view of a thermal joint 2200 of FIG. 22 inaccordance with a representative embodiment is shown. The thermal joint2200 can be a thermal and mechanical coupling between the heat pipe 2230and the pipe connector 2240. The heat pipe 2230 is associated withcabinet 2220. The pipe connector 2240 is associated with heat sink 2210.

The pipe connector 2240 includes heat pipe conduit 2245. The pipeconnector 2240 is docked on heat pipe protrusion 2235 that matches heatpipe conduit 2245. In FIG. 23, the heat pipe protrusion 2235 and theheat pipe conduit 2245 have a circular profile. Alternatively, othervarious profiles can be used such as in FIGS. 5A-5F.

The pipe connector 2240 can also include a clamping slot 2347. Theclamping slot 2347 can be used in conjunction with a clamping mechanism.For example, when a clamping lever of a clamping mechanism is pressedin, the clamping mechanism could close the clamping slot 2347 therebytightening the heat pipe conduit 2245. The clamping action creates abetter thermal coupling between the pipe connector 2240 and the heatpipe 2230. Additionally, the clamping action fastens the cabinet 2220 tothe heat pipe 2230 so that the cabinet 2220 cannot move and so that thecabinet 2220 maintains thermal continuity with heat sink 2210. Thus, thecabinet 2220 can be quickly removed and replaced. Alternatively, manyother clamping and/or attachment mechanisms are possible.

Referring to FIG. 24, a top view of a protected heat pipe 2400 inaccordance with a representative embodiment is shown. In oneillustrative embodiment, the heat pipe 2430 is associated with a heatsink 2410. A matching pipe connector (not shown) is associated with acabinet (not shown). Alternatively, the heat pipe is associated with acabinet and the pipe connector is associated with the heat sink.

The heat pipe 2430 is thermally coupled to the heat sink 2410. The heatpipe 2430 includes a heat pipe protrusion 2435. The heat pipe protrusion2435 can have various profiles such as in FIGS. 5A-5F. A protectiveblock 2485 slides over the heat pipe protrusion 2435. The protectiveblock 2485 is spring-loaded by spring 2480. The protective block 2485prevents the heat pipe protrusion 2435 from getting bent or otherwisedamaged.

When a matching pipe connector is slid over the heat pipe protrusion2435 the protective block 2485 retracts. Eventually, notches 2490 areexposed. The pipe connector can engage the notches 2490 to secure thepipe connector to the heat pipe protrusion 2435. Alternatively, a heatpipe with protective block can be associated with a cabinet.

The foregoing description of the representative embodiments have beenpresented for purposes of illustration and of description. It is notintended to be exhaustive or to limit the invention to the precise formdisclosed, and modifications and variations are possible in light of theabove teachings or may be acquired from practice of the invention. Forexample, the described representative embodiments focused on arepresentative implementation of a horizontal drive configuration on arack-mount server. The present invention, however, is not limited to arepresentative implementation as described and depicted. Those skilledin the art will recognize that the device and methods of the presentinvention may be practiced using various combinations of components.Additionally, the device and method may be adapted for differentelectronics systems that need to be cooled. The embodiments were chosenand described in order to explain the principles of the invention and aspractical applications of the invention to enable one skilled in the artto utilize the invention in various embodiments and with variousmodifications as suited to the particular use contemplated. It isintended that the scope of the invention be defined by the claimsappended hereto and their equivalents.

1. An apparatus for passively cooling electronics comprising: at leastone heat sink configured to be thermally coupled to at least onecabinet, wherein when at least one cabinet is thermally coupled to theat least one heat sink, the at least one heat sink draws heat from theat least one cabinet.
 2. The apparatus of claim 1, wherein the at leastone heat sink further comprises a pipe connector configured to bethermally coupled to at least one heat pipe of the at least one cabinet.3. The apparatus of claim 2, wherein the pipe connector comprises aclamping mechanism configured to enhance the thermal coupling of the atleast one cabinet to the at least one heat sink.
 4. The apparatus ofclaim 2, wherein the pipe connector comprises a slot and the at leastone heat pipe comprises at least one compression rail configured topress against the slot.
 5. The apparatus of claim 1, wherein the atleast one heat sink comprises an aluminum alloy.
 6. The apparatus ofclaim 5, wherein the at least one heat sink comprises a heat spreader.7. The apparatus of claim 5, wherein the heat spreader comprises acopper alloy.
 8. The apparatus of claim 1, wherein the at least one heatsink comprises at least part of a channel, wherein the channel isconfigured to provide a cooling fluid.
 9. The apparatus of claim 1,wherein the channel is configured to be part of a heating ventilationand air conditioning (HVAC) system of a building.
 10. An apparatus forpassively cooling electronics comprising: a cabinet configured to bethermally coupled to at least one heat sink, wherein when the cabinet isthermally coupled to the at least one heat sink, the at least one heatsink draws heat from the cabinet.
 11. The apparatus of claim 10, whereinthe cabinet further comprises a pipe connector configured to bethermally coupled to at least one heat pipe of the at least one heatsink.
 12. The apparatus of claim 11, wherein the pipe connectorcomprises a clamping mechanism configured to enhance the thermalcoupling of the cabinet to the at least one heat sink.
 13. The apparatusof claim 10, wherein the cabinet further comprises at least onecompression rail configured to press against a slot of the at least oneheat sink.
 14. The apparatus of claim 10, wherein the cabinet comprisesa sealed cabinet.
 15. The apparatus of claim 10, wherein the cabinetcomprises at least one of a server, a switch, a router, a storagedevice, a battery backup, and electrical equipment.
 16. The apparatus ofclaim 10, wherein the cabinet is configured to be removably coupled tothe at least one heat sink.
 17. A method for passively coolingelectronics comprising: drawing heat from a cabinet through a thermaljoint to at least one heat sink; and dissipating the heat in a channel,wherein the at least one heat sink forms at least part of the channel.18. The method of claim 17, wherein the channel is part of a heatingventilation and air conditioning (HVAC) system of a building.
 19. Themethod of claim 17, wherein the cabinet comprises at least one of aserver, a switch, a router, a storage device, a battery backup, andelectrical equipment.
 20. The method of claim 17, wherein the channel isconfigured to passively draw in fluid to dissipate heat in the channel.